# PostGrid

**Canonical:** https://apis.io/providers/postgrid/  
**Website:** https://www.postgrid.com/  
**APIs profiled:** 3

PostGrid is a physical mail automation platform that provides REST APIs for sending printed letters, postcards, checks, and self-mailers at scale. It offers a Print & Mail API that enables developers to programmatically trigger and manage direct mail campaigns with full personalization and tracking support. PostGrid also provides US & Canada Address Verification and International Address Verification APIs covering 245+ countries for real-time autocomplete, standardization, geocoding, and bulk batch verification. The platform supports both test and live API environments, integrates natively with Salesforce, HubSpot, Zapier, and Marketo, and handles postage, printing, and delivery end-to-end.

## Kin Score — 31.0 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 31.0).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 37.3 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 9.5 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 15.5 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Paid (free trial) — onboarding: unknown, pricing: paid, trial: yes (confidence: medium).

## APIs (3)

- **PostGrid Print & Mail API** — A REST API for programmatically sending letters, postcards, checks, and self-mailers. Handles printing, postage, and delivery with support for templates, contacts, tracking, web...
- **PostGrid US & Canada Address Verification API** — A REST API for real-time address autocomplete, verification, and standardization for US and Canadian addresses. Supports CASS-certified validation, geocoding (latitude/longitude...
- **PostGrid International Address Verification API** — A REST API for verifying, standardizing, and autocompleting addresses across 245+ countries worldwide. Supports real-time lookups and bulk verification workflows. Authenticated ...

## Security (1)

- **Postgrid Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **Postgrid Plans Pricing**

## Tags

Direct Mail, Print & Mail, Address Verification, Address Validation, Postcards, Letters, Checks, Physical Mail, Mail Automation, Address Autocomplete, Geocoding

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/postgrid/). Scores are computed from the provider's own public artifacts under a published rubric.